The invention belongs to the field of wallboard and brick preparation, and more specifically relates to environment-friendly ceramsite partition boards, bricks, and a preparation method thereof. The interior wall tiles are prepared from, by weight, 20 to 30 parts of Portland cement, 30 to 40 parts of ceramsite, 10 to 15 parts of flyash, 0.02 to 0.04 part of water glass, 0.1 to 0.2 part of silicon powder, 0.01 to 0.02 part of a foaming agent, 0.01 to 0.02 part of polypropylene fiber, 0.01 to 0.02 part of a water reducing agent, 10 to 20 parts of tailing sand, 10 to 15 parts of tea stem powder, 8 to 12 parts of paper white sludge, and 60 to 100 parts of water. According to the invention, tea stem powder and paper white sludge are added into raw materials such as cement and ceramsite, so that air purifying effect, thermal insulation effect, sound insulation effect, and anti-permeability are achieved; and tea stem powder and paper white sludge are wastes, so that wastes are changed into valuables, and economic value is increased.